The Kinko Craftsman: Techniques for Tsuba, Menuki, and Habaki in Japanese Sword Fittings

Who Are Kinkoushi (Metal Artisans)?

A finished Japanese sword requires not only the blade itself but also numerous metal components: the tsuba (guard), menuki (handle ornaments), fuchikashira (pommel cap), seppa (spacer rings), koiguchi (scabbard mouth), tsumami (cord loop), kaeri-zuno (upper cord loop), obidome (belt fastener), and others. These are collectively called "kodogu" or "tosugu" (sword fittings), and the craftsmen who create them are known as kinkoushi, kinko, or kodogushi (metal workers/fittings makers).

The work of kinkoushi is an entirely separate domain from katanashi (swordsmiths who forge blades), and their techniques encompass diverse metalworking skills including metal sculpture, inlay, and casting. The tsubas and menuки crafted by master kinkoushi sometimes possess artistic value equal to or exceeding that of the blade itself, and signed works fetch high prices at auctions both domestically and internationally.

Explanation of Major Techniques

Takabori (High Relief) and Nikubori (Solid Carving): Techniques that carve the metal surface in semi-three-dimensional form, creating raised patterns of dragons, waves, arabesques, and other motifs. The Edo school of kinko, centered on the Gotou family, brought this technique to its most refined form. This is the "viewpoint" that corresponds to the blade's hamon and is the first element viewers notice.

Kebori (Hair-line Engraving): A technique using fine linear incisions to express patterns. It is well-suited for detailed depiction of animal fur, leaf veins, water ripples, and the like. Examples exist where Bizen swordsmiths decorated the edges of tsubas with kebori, representing a domain where swordsmithing and metal-working techniques overlap.

Nunome Zougan (Cloth-grain Inlay): An inlay technique where a grid-like pattern of fine scratches is made on the metal surface using a hammer (cloth-grain pattern), then thin sheets of gold or silver are hammered into these indentations and fixed in place. This is frequently used when adding gold and silver patterns to iron tsubas. It is particularly effective in creating visual richness in armor and tsuba ornamentation.

Sukashibori (Openwork Carving): A technique creating patterns by cutting holes through the metal. Natural motifs such as bamboo, plum, chrysanthemum, and butterflies are commonly used, with Higo tsubas featuring openwork being typical examples of this technique. The shape and placement of the openwork are among the elements that best express a kinko's individuality.

Tokin (Gold Plating) and Dougin (Silver Plating): Techniques for fixing gold or silver to a metal surface using the mercury amalgam method (fire plating) or, in modern times, electroplating. These are not used in principle on Higo-style mountings, but are frequently employed in the luxurious Edo-school styles.

Characteristics and History of Major Schools

Gotou-ke (Gotou Family): A lineage founded by Gotou Yuujou in the late Muromachi period, continuing as official supplier to the Tokugawa shoguns until the end of the Edo period. The "Gotou style"—red copper ground treated with high relief and finished in gold—is evaluated as the highest-ranked kinko work. Works by the Gotou family show stylistic evolution across generations: first-generation Yuujou, second-generation Jouei, third-generation Joetsugu, and so forth.

Yokoya-ha (Yokoya School): A mid-Edo period school founded by Yokoya Soumin (1670–1733). Distinguished by dynamic composition and bold high relief work unlike the traditional Gotou style, it established a new aesthetic applying gold boldly to red copper ground. After Soumin, his students Soubi, Soushin, and Soushun were active throughout the late Edo period.

Nara-ha (Nara School): A school descended from Nara Toshiju (1667–1751), counted among the Nara Denzan-saku (one of three great traditions alongside Gotou and Yokoya). Known for its work on iron tsubas using special materials such as nanban-tetsu (foreign iron), it is characterized by fine naturalistic depiction and unique pattern interpretation.

Yanagawa-ha (Yanagawa School): A school that rose to prominence from the mid-Edo period onward, with numerous branch families including the Ishiguro and Yanagawa families. Specializing in delicate high relief work on small tsubas and menuki, it is highly regarded for its realistic depiction of animals and plants.

Modern Kinkoushi—Continuing a Fading Tradition

The number of contemporary kinkoushi is extremely limited, with only dozens of practitioners of authentic traditional kinko metalworking remaining across the country. Most work in individual workshops or small traditional craft studios, creating new fittings while also undertaking restoration and conservation of existing pieces.

The difficulty in passing on the tradition stems from the requirement of 5–10 years minimum to acquire the skills and the extremely meager income during the years before a craftsman's work gains recognition. Some kinkoushi are finding a path forward through tourism crafts and experience programs, with some workshops now offering "tsuba-making experiences" for inbound visitors.

A culture is developing where kinkoushi works are recorded and evaluated with "kinko-mei" (metalworker's signatures) equivalent to swordsmith signatures. NBTHK authentication certificates now include the names of craftspeople responsible for the fittings, raising the value of individual kinkoushi as personal brands. For the overall preservation and development of Japanese sword culture, the technical transmission of kinkoushi is as essential as that of swordsmiths.